.a_demo_one {
    background-color:#3DB6E3;
    padding:10px;
    position:relative;
    font-family: 'Open Sans', sans-serif;
    font-size:12px;
    text-decoration:none;
    color:#fff;
    border: solid 1px #186F8F;
    background-image: linear-gradient(bottom, rgb(171,27,27) 0%, rgb(212,51,51) 100%);
    border-radius: 5px;
}
 
.a_demo_one:active {
    padding-bottom:9px;
    padding-left:10px;
    padding-right:10px;
    padding-top:11px;
    top:1px;
    background-image: linear-gradient(bottom, rgb(171,27,27) 100%, rgb(212,51,51) 0%);
}

.a_demo_one::before {
    background-color:#ccd0d5;
    content:"";
    display:block;
    position:absolute;
    width:100%;
    height:100%;
    padding:8px;
    left:-8px;
    top:-8px;
    z-index:-1;
    border-radius: 5px;
    box-shadow: inset 0px 1px 1px #909193, 0px 1px 0px #fff;
}